Ducking system settings and state. More...

#include <lib/audio/mixer.h>

Data Fields
float	threshold_dB
	Speaking threshold in dB (sources below this are not "speaking")

float	leader_margin_dB
	Leader margin in dB (sources within this of loudest are leaders)

float	atten_dB
	Attenuation in dB for non-leader sources.

float	attack_ms
	Ducking attack time in milliseconds.

float	release_ms
	Ducking release time in milliseconds.

float	attack_coeff
	Attack coefficient (converted from attack_ms)

float	release_coeff
	Release coefficient (converted from release_ms)

float *	envelope
	Per-source envelope follower state (linear, allocated per source)

float *	gain
	Per-source ducking gain (linear, calculated from envelope)

Detailed Description

Ducking system settings and state.

Implements active speaker detection and automatic ducking (attenuation) of background sources. Prevents echo and feedback in multi-client audio scenarios.

DUCKING BEHAVIOR:

Detects loudest active speaker (above threshold_dB)
Identifies sources within leader_margin_dB of loudest (also active)
Attenuates non-active sources by atten_dB
Uses smooth attack/release for natural transitions

Note: Ducking gain is applied per-source, allowing multiple active speakers to be heard while attenuating background noise.

Definition at line 271 of file mixer.h.

The documentation for this struct was generated from the following file:

mixer.h

Data Fields

Detailed Description